Great idea. Let's generalize to respect the length of each field and make the substitutions in the original text. 
use strict;
use warnings;
use Regexp::Common qw /net/;
my $string ='194.66.82.11';

$string =~
    s/$RE{net}{IPv4}{-keep}
     /'x'x(length $2)
     . '.'
     . 'x'x(length $3)
     . '.'
     . 'x'x(length $4)
     . '.'
     . $5
     /xge;
print $string;

[download]
Bill

In reply to Re^2: Filtering out IP addresses by BillKSmith
in thread Filtering out IP addresses by Anonymous Monk

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